Conference Systems - IR and RF wireless Stethophone
$164.95
General Description
Stethophone receiver for single channel 2.3 MHz system, with BA151 (1.6 oz)
Features
- Wideband stethoset receiver
- Extremely reliable transmission due to new carrier frequency (2.3 MHz)
- Extremely lightweight – only 45 g
- Excellent speech intelligibility and good music reproduction
- Very easy to use
- Operates on environmentally friendly rechargeable NiMH accupack
Conference Systems - IR and RF wireless Stethophone
$164.95
Technical Data
| Modulation |
FM, Mono |
| Carrier frequency |
2.3 MHz |
| Frequency response (headphones) |
18 - 18,000 Hz |
| Total harmonic distortion (THD) |
< 1% |
Conference Systems - IR and RF wireless Stethophone
$164.95
Recommended Accessories
| Part/Accessory |
Article No. |
| BA 151 |
004146 |
Rechargeable battery for IR and RF wireless headsets
|
| HC 230 |
USHC230 |
Charger and carrying case for up to (20) receivers (RI 150, RI 250 or HDI 302), includes (2) L 151-10 and (1) NT 2013-120
|
Conference Systems - IR and RF wireless Stethophone
$164.95
Variants
$164.95
Glossary
| Frequency response (headphones) |
| The frequency response of a pair of headphones is given within limits defined by the manufacturer. |
| Modulation |
| The process in which one wave is varied by some parameter of another wave, for example, an RF carrier frequency that is modulated by an audio signal. Types of modulation include amplitude modulation, frequency modulation, pulse code modulation and pulse width modulation. |
| Total harmonic distortion (THD) |
| Total harmonic distortion is a measure of non-linear harmonic distortion and is given in %. Non-linear harmonic distortions are signals which were not present in the original before the signal was converted by the headphones. These unwanted signals are caused by the diaphragm, whose movements do not precisely move in time with the electric signals that cause it to move. Unfortunately, this is a feature of all electroacoustic transducers. Although it cannot be completely eliminated, suitable steps can be taken to minimise it. However, the user is not interested in why this distortion takes place but in how great the level of distortion must be for it to become perceptible. According to the findings of several research projects, a total harmonic distortion of 1% in the frequency range of 100 to 2000 Hz is imperceptible. Below 100 Hz, the perceptibility threshold lies at 10%. |
